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BICKERSTAFF, OF CINGINNA'II OHIO.

Letters Patent N0. 77,953, dated May 19, 1868v IMPROVEMENT IN HERMETIcALL -GLOSED n) KEYLESS PADLOGK.

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TO ALL WHOM IT MAY CONCERN: I l

Be it known that I, .S. BIcKER STAFEof the city of Cincinnati,county of Hamilton, and State of Ohio, have invented a novel Method of Manufacturing Seal Locks; and I do hereby declare that the following is a full and clear description thereof, reference being had to the accompanying drawing, and to the letters of reference marked thereon, in whichi Figure 1 is a vertical longitudinal sectional of the-invention.

Figure 2 is a transverse section of the some.

is the body of the lock; B isthe shackle; B, the orifices of the body forthe rceeptionof the shackle, enlarged at the bottom, as seen at B; b 6, slots cut in the shackle; b b, the catches at the ends of the shackle; C C, shoulders on the shackle to prevent the entrance of water to the interior of the'lock.

The ob'eet of this invention is to rovidc a seal-lock for Government and other )ur oses, bv which tam er- 7 .l P l P t P ing with the lock is prevented, and the money or other valuables kept secure until such times as maybe desired to open the same by the proper authority.

I construct a bar of composition or other metal, of cylindrical or other form, which may be entirely plain or ornamental, as represented. At each end, and parallel with each other, I cast or bore holes, of the size of the shackle, some distance beyond the axis of the cylinder, and from the axis I enlarge the lower part about one-eighth of an inch or more, the shacklesto be made of steel or other metal, and the two ends to be staved up to form a boss to fit the size of the lowcr,chamber neatly. I then saw the slots in the ends aboutan eighth of an inch wide, and long enough only to give elasticity to the sides of the shackle. The notches around the bosses are then cut and neatly fitted, so that the ends of the shackle can be forced into the cylindrical holes by V compressing the sides, and which will immediately open when they are forced below the upper. edges of the enlarged chambers. V The shackle, when conipleted,is to be properly hardened sQ that it cannot .be easily out; and, to open the lock, the body or shackle must be sawed in two.

It will be seen that I construct this self-sealing keyl'css lock of only twopieces, having neither rivets, bolts, sere\vs,nor openings of any kind, except for the reception ofthe shackle, and which is burglar-proof, and must be destroyed to be opened. y I

Having thus described my invention, what I claim, and desire to secure by Letters Patent of the United States, as a new article of manufacture, is i A self-scaling or keylcss padlock, consisting of two pieces only," the body and the shackle, and constructed;

without rivets, bolts, screws, or openings ofany kind, except for the reception of the shackle, substantially as fihown and described. a

s. BIoKEnsTAFF.

Witnesses:

Jno. S. HOLLINGSIIEAD, Jenn D. 131.0011. 

